Remix Ethereum is an integrated development environment (IDE) used to simplify smart contract development on Ethereum (solidity). You can create smart contracts easily without having to download software. Developing a dapp can also be useful for any blockchain contests.
To create a fast smart contract (remember to choose the EVM chain by switching to METAMASK based on where you intend to develop the contract):
-Create New File
-Choose the smart contract name xxx.sol
-Write the smart contract code in the right box
-Solidity Compiler (in the far left vertical pane, third icon) and Compile xxx.sol
-Deploy And Run Transactions (always vertical box on the far left, fourth icon) and on Environment set Injected Provider - Metamask (you will read your Metamask address), finally Deploy (you will pay a commission, based on the chain you are using)
Through Deploy and Run Transactions it is possible to deploy your smart contracts directly on the Ethereum or Layer2 (EVM) blockchain. It is also possible to simulate on blockchain by choosing "VM Environment" (always on Environment). Furthermore, it provides an interface to interact with existing contracts, allowing you to test features interactively. Library management can be done in the "Solidity Compiler" section under the "Settings" tab. Also in the vertical menu, in addition to the Debugger, you can find the Static Security Analyzer: which includes a static analysis tool that can help you identify potential security vulnerabilities in your smart contract code.
BASIC SOLIDITY FUNCTIONS
Contracts: Contracts are the foundation of Solidity and represent units of autonomous code on the Ethereum blockchain.
contract MyContract {
// Declarations and contract logic
State variables: State variables store permanent data within the contract.
uint256 public myVariable;
: Functions execute specific logic when called.
function myFunction() public {
// Function logic
: Modifiers change the behavior of functions.
modifier onlyOwner() {
require(msg.sender == owner, "Only the owner can call this function");
: events are used to record and log activities within the contract.
event LogEvent(address indexed sender, uint256 value);
Mappings: Mappings are data structures that associate keys with values.
mapping(address => uint256) public balances;
Payments and Transfers: Solidity supports sending and receiving ETH.
function sendEther() public payable {
// Receive ether
Programming models: Solidity supports object-oriented programming, procedural programming and other paradigms.
struct Person {
string name;
uint256 age;
Exception handling: use require and revert to handle error situations.
function myFunction() public {
require(msg.sender == owner, "Permission denied");
// Function logic
ERC-20 Token (standard): Solidity is often used to create tokens compliant with the ERC-20 standard.
contract ERC20Token {
mapping(address => uint256) public balances;
function transfer(address to, uint256 amount) public {
require(balances[msg.sender] >= amount, "Insufficient funds");
balances[msg.sender] -= amount;
balances[to] += amount;
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